.development_model{
    position: relative;
    width: 1200px;
    height: 500px;
    margin: 150px auto;
    border-radius: 250px;
    line-height: 500px;
    padding-left: 100px;
    font-size: 110px;
    background-color: rgba(0,245,255,0.5);
}
.development_model a{
    color: #fff;
    width: 1060px;
    height: 460px;
}